Sounds like he set that conversation up TO tell you you were not a good kisser.
That and the fact that he BRAGS about being a good kisser AND he says 'everyone says' (abusive people buzz phrase btw) and you're on here asking if other people would be hurt or you are 'overreacting' to such obviously hurtful behaviour (abusers like to convince you you overreact. AND that you have no right to find obviously hurtful behaviour, hurtful).
There's some big red flags here potentially op. Amd I know it's a buzz word but I think you might be dealing with a narcissist (as in npd).
I've said it a million times on this site but ' if you ever, EVER find yourself having to explain to a grown adult why obviously hurtful behaviour is hurtful - you are in an abusive relationship.
I strongly suspect this isn't a fluke, that he is up to no good, testing the waters to abuse you. If it's not been going on already. But way you can verify this are to look for other red flags of abusers.
It sound like this guy may be targeting your self esteem so things go look out for are - little digs that if you call him on, he tells you to lighten up or 'it's just a joke', comparing you unfavorabley to other women eg, 'I wish you'd dress more like her (woman on tv), always taking the opposite view to you in any subject ife starts to feel like one big ongoing argument/provocation for one) taking the side of anyone who has upset you (under the guise of 'I'm only giving you their side of things') and implying you might be the person who has done something wrong not them.
Also Mentioning an ex or some other woman a lot as if he's still hung up on her (to make you feel insecure). Commenting on any insecurities you have, disguising it as 'on trying to help' - for example, telling you your bum looks too big in a dress that they know you really like to wear.
Telling you 'everyone thinks' or 'everyone says' something about you (or that one of your friends/family think something about you - as abusers often want to alienate you from family).
Laughing at or belittling any hobbies/ambitions/dreams you have. Not supportive or complimentary of your achievements. Eg, if you get a promotion they might imply you didn't deserve it or its just not a big deal.
Things to look out for.